Be sure and check the lower con rod bearing and make sure it is not missing rollers, this is what happend to my first engine that did exactly what you just described yours did.....
Mine seized up on me, I was able to get it unseized and then I thought it might be ok, I put it on another bike an it started and seemed to run fine, I took of one day on a 8 or 9 mile trip and on the way back about 200 yards form my house itjust quit and wizzed down to nothing, I could tell it had lost all compression....so I knew it wasn't a good thing that just happened, I pulled the jug and I had a ring broke, deep score it piston, deep score in cylinder wall, large chunk busted out of transfer port and then after checking things closer I realized that I was missing one or 2 needle bearing on the crank because there was way too much space in between the ones that were left and I could see that they tried to turn at an angle on the crank instead of sitting straight on the crank journal.
This is when I got a used crank form someone and rebuilt that engine and it ran very good until that used crank petered out on me and ate into the case on the clutch side allowing the mag rotor to eat into the case on it's side and destroy the crank seal.
Check that lower end out very good or you may be rebuilding another grenade.......
best wishes to ya
Peace
thinking now i'm gonna swap the mag coil over to the grubee bottom end when i rebuild it. that way i'll have time to pull this one apart and carefully inspect everything in it.
Very good idea.....I would hate to see you put all that money and trouble in that lower just to hammer it again like I did mine..........
I was just being a cheap skate noob when I did mine, but I learned a valuable lesson from that mistake.
ouch man, that sucks.
was almost tempted to get some puch parts to replace it with c:
it was so hot out today i had to go for a 8 mile ride to cool off. a woppin 72 degrees felt like i was in an oven
LOL WA. I read th 1st 5 words and thought; "wut, got up to 70?"
80 and muggy today here after the snowiest winter I have seen in CT. It just rained for 11 st8 days and we got 'skeeters bitting skeeter as we 2 legged folks are running out of blood for em. As soon as I get done mowing/fixing mowers, I am building about 50 bird houses and one big butt bat house, snork. Only thing I got to do with my MB is move it out of the way this week
OH Man Map! I didn't think of that! At the end of our property, is a marsh that is the end of a large pond or very small lake. Thank you! Like spammers, kill em young and be bothered less.
Ya got me thinking 20 or 30 feeder gold fish. Them things could survive a nuc war. The fish go quick here. Lots of geese and swan. (Or as i like to call em, large killer ducks.) They will chase a large dawg or a very kind Carol. They run from me. I go for their necks. LOL, freaks em out. Har, lol. Think I sould get an air horn.
Just realized my 3rd and doner parts mower has a really cool gas tank. Want to do a pusher MB and would work great.